The idea is great ! The only real downside to me is the lack of background. I had difficulty orienting myself in space. A grid or some minimal geometric scenery would help make the movement feel less disorienting/nauseating.
But great concept !

It's a shame there isn't more feedback. Some freeze frames, screen shake, and a few other little effects would've really improved the game, because it already has a solid foundation!

Also, nice job managing to add upgrades to keep the runs going further. I probably would've sped up the little restart dialogue, or made it skippable when you just want to jump back into the game quickly, but that's a pretty minor detail.